U.S. patent application number 15/240163 was filed with the patent office on 2017-09-28 for user equipment and method for data transmission.
The applicant listed for this patent is LE HOLDINGS (BEIJING) CO., LTD., LEMOBILE INFORMATION TECHNOLOGY (BEIJING) CO., LTD.. Invention is credited to Wei WANG, Qing ZHAO.
Application Number | 20170277650 15/240163 |
Document ID | / |
Family ID | 59897987 |
Filed Date | 2017-09-28 |
United States Patent
Application |
20170277650 |
Kind Code |
A1 |
ZHAO; Qing ; et al. |
September 28, 2017 |
User equipment and method for data transmission
Abstract
Embodiments of the disclosure disclose user equipment and a
method for data transmission, and the user equipment includes: a
USB Type-C interface, a USB physical layer, an audio codec and an
analog switch device. A left channel terminal and a right channel
terminal of the audio codec and a data transmission terminal of the
USB physical layer multiplex D+ and D- pins of the USB Type-C
interface. The first analog switch device is configured to, when
detecting that an analog audio cable is inserted into the USB
Type-C interface, switch the D+ and D- pins of the USB Type-C
interface to connect the left channel terminal and the right
channel terminal of the audio codec, respectively.
Inventors: |
ZHAO; Qing; (Beijing,
CN) ; WANG; Wei; (Beijing, CN) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
LE HOLDINGS (BEIJING) CO., LTD.
LEMOBILE INFORMATION TECHNOLOGY (BEIJING) CO., LTD. |
Beijing
Beijing |
|
CN
CN |
|
|
Family ID: |
59897987 |
Appl. No.: |
15/240163 |
Filed: |
August 18, 2016 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
|
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PCT/CN2016/088660 |
Jul 5, 2016 |
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15240163 |
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Current U.S.
Class: |
1/1 |
Current CPC
Class: |
G06F 13/385 20130101;
G06F 13/4022 20130101; G06F 13/4282 20130101 |
International
Class: |
G06F 13/42 20060101
G06F013/42; G06F 13/40 20060101 G06F013/40; G06F 13/38 20060101
G06F013/38 |
Foreign Application Data
Date |
Code |
Application Number |
Mar 25, 2016 |
CN |
2016101770633 |
Claims
1-6. (canceled)
7. A user equipment, comprising: a USB Type-C interface, which is
compatible with USB signal delivery and analog audio peripherals; a
USB physical layer, which is configured to connect with the USB
Type-C interface to realize the transmission of a USB signal; an
audio codec, which is configured to connect with the USB Type-C
interface to realize the transmission of an analog audio, wherein a
left channel terminal and a right channel terminal of the audio
codec and a data transmission terminal of the USB physical layer D+
and D- pins of the USB Type-C interface; and a first analog switch
device, which is configured to implement the multiplexing, wherein
the first analog switch device is configured to, when detecting
that an analog audio cable is inserted into the USB Type-C
interface, switch the D+ and D- pins of the USB Type-C interface to
connect the left channel terminal and the right channel terminal of
the audio codec respectively, and when detecting that a USB cable
is inserted into the USB Type-C interface, switch the D+ and D-
pins of the USB Type-C interface to connect the data transmission
terminal of the USB physical layer respectively.
8. The user equipment according to claim 7, wherein the first
analog switch device is configured to judge the type of a cable
inserted into the USB Type-C interface by detecting a resistance
value of a CC1 pin and/or CC2 pin of the USB Type-C interface.
9. The user equipment according to claim 7, wherein the first
analog switch device is configured to determine that an analog
audio cable is inserted into the USB Type-C interface when
detecting that both the resistance value between the CC1 pin and a
GND pin of the USB Type-C interface and the resistance value
between the CC2 pin and the GND pin of the USB Type-C interface are
less than 1 k.OMEGA..
10. The user equipment according to claim 7, further comprising: a
second analog switch device configured to realize the transmission
of microphone data of the audio codec by using a SBU1 pin or a SBU2
pin of the USB Type-C interface.
11. The user equipment according to claim 10, wherein the second
analog switch device is configured to judge whether an analog audio
cable inserted into the USB Type-C interface supports a microphone
by detecting a resistance value of the SBU1 pin or the SBU2 pin of
the USB Type-C interface.
12. The user equipment according to claim 7, wherein the user
equipment is a smart phone, a portable computer, a tablet computer
or a desktop computer.
13. A method for data transmission, which is applied to user
equipment, the method comprising: judging the type of the cable
inserted into the USB Type-C interface of the user equipment; when
detecting that an analog audio cable is inserted into the USB
Type-C interface, switching the D+ and D- pins of the USB Type-C
interface to connect with the left channel terminal and the right
channel terminal of the audio codec respectively, and when
detecting that a USB cable is inserted into the USB Type-C
interface, switching the D+ and D- pins of the USB Type-C interface
to connect with the data transmission terminal of the USB physical
layer respectively; wherein the USB Type-C interface is compatible
with USB signal delivery and analog audio peripherals; the USB
physical layer is connected with the USB Type-C interface to
realize the transmission of a USB signal; the audio codec is
connected with the USB Type-C interface to realize the transmission
of an analog audio.
14. The method according to claim 13, wherein judging the type of
the cable inserted into the USB Type-C interface of the user
equipment, further comprises: judge the type of the cable inserted
into the USB Type-C interface by detecting a resistance value of a
CC1 pin and/or CC2 pin of the USB Type-C interface.
15. The method according to claim 13, wherein judging the type of
the cable inserted into the USB Type-C interface of the user
equipment, comprises: determine that the analog audio cable is
inserted into the USB Type-C interface, when detecting that the
resistance value between the CC1 pin and a GND pin of the USB
Type-C interface and the resistance value between the CC2 pin and
the GND pin of the USB Type-C interface are both less than 1
k.OMEGA..
16. The method according to claim 13, further comprising: achieving
the microphone data transmission of the audio codec by utilizing a
SBU1 pin or a SBU2 pin of the USB Type-C interface.
17. The method according to claim 13, further comprising: judging
whether the analog audio cable inserted into the USB Type-C
interface supports a microphone by detecting the resistance value
of the SBU1 pin or the SBU2 pin of the USB Type-C interface.
18. The method according to claim 13, wherein the user equipment is
a smart phone, a portable computer, a tablet computer or a desktop
computer.
Description
CROSS REFERENCE TO RELATED APPLICATIONS
[0001] The present application is a continuation of PCT application
which has an application number of PCT/CN2016/088660 and was filed
on Jul. 5, 2016. The present application claims the priority of
Chinese patent application No. 201610177063.3, entitled "User
Equipment", filed with the State Intellectual Property Office of
the People's Republic of China on Mar. 25, 2016, which is
incorporated herein by reference in its entirety.
TECHNICAL FIELD
[0002] Embodiments of the disclosure relate to the field of
electronic technology, particularly to user equipment with a USB
TYPE-C interface and a method for data transmission, and besides
being useful for a USB data transmission, the USB TYPE-C interface
can also be compatible with an audio transmission of an analog
headphone.
BACKGROUND
[0003] Computers have gained popularity, which fully influences
people's daily lives. They have plentiful interfaces: a serial
port, a parallel port, a HDMI, a SATA and the like, wherein the
most widely used is a universal serial bus interface, commonly
called USB. It can not only connect storage equipment, but also
serve as a universal expansion interface. As technology advances,
the speed of a USB interface becomes faster and faster, and the USB
interface can be compatible with more and more equipments.
Meanwhile, the shape of the USB interface is also going through
changes, from TYPE A to MINI then to MICRO B. Today, the most
popular USB shape is TYPE-C. It not only has a fast speed and
transmits a large current, but also supports a reciprocal plug. It
is convenient and easy to use.
[0004] In the process of realizing this disclosure, the inventor
finds that there are at least the following issues in related
technologies: today, there are a USB digital interface and an
analogue headphone interface on a phone typically. FIG. 1 shows a
structure diagram of a headphone plug provided by the prior art.
FIG. 2 shows a structure diagram of a headphone socket provided by
the prior art. As shown in FIGS. 1 and 2, the diameter of the
headphone plug is typically 3.5 mm, and since the headphone plug
needs to be entirely covered by the headphone socket, the thickness
of the headphone socket cannot be less than 3.5 mm, which means
that the existing headphone socket must occupy a certain printed
circuit board (PCB) space of the phone, and which is one reason why
the phone cannot be thinner.
SUMMARY
[0005] In view of this, the purpose of the embodiments of the
disclosure is to provide a new analog audio transmission scheme to
overcome the aforesaid deficiencies in the prior art, so that the
user equipment can be designed more portable.
[0006] The embodiments according to the disclosure provide user
equipment, which includes: a USB Type-C interface, which is
compatible with USB signal delivery and analog audio peripherals; a
USB physical layer, which is configured to connect with the USB
Type-C interface to realize the transmission of a USB signal; an
audio codec, which is configured to connect with the USB Type-C
interface to realize the transmission of an analog audio, wherein a
left channel terminal and a right channel terminal of the audio
codec and a data transmission terminal of the USB physical layer
multiplex D+ and D- pins of the USB Type-C interface; and a first
analog switch device, which is configured to achieve the
multiplexing. The first analog switch device is configured to, when
detecting that an analog audio cable is inserted into the USB
Type-C interface, switch the D+ and D- pins of the USB Type-C
interface to connect with the left channel terminal and the right
channel terminal of the audio codec respectively, and is configured
to, when detecting that a USB cable is inserted into the USB Type-C
interface, switch the D+ and D- pins of the USB Type-C interface to
connect with the data transmission terminal of the USB physical
layer respectively.
[0007] In one embodiment, the first analog switch device or the
second analog switch device is configured to judge the type of the
cable inserted into the USB Type-C interface by detecting a
resistance value of a CC1 pin and/or CC2 pin of the USB Type-C
interface.
[0008] Further, the first analog switch device is configured to
determine that an analog audio cable is inserted into the USB
Type-C interface, when detecting that the resistance value between
the CC1 pin and a GND pin and the resistance value between the CC2
pin and the GND pin are both less than 1 k.OMEGA..
[0009] In one embodiment, the user equipment further includes the
second analog switch device, which is configured to achieve the
microphone data transmission of the audio codec by utilizing a SBU1
pin or a SBU2 pin of the USB Type-C interface.
[0010] Further, the second analog switch device is configured to
judge whether the analog audio cable inserted into the USB Type-C
interface supports a microphone by detecting the resistance value
of the SBU1 pin or the SBU2 pin of the USB Type-C interface.
[0011] In one embodiment, the user equipment can be a smart phone,
a portable computer, a tablet computer, a desktop computer or other
appropriate user equipments having the USB Type-C interface and
supporting an analog audio output.
[0012] Another embodiment of the present disclosure provides a
method for data transmission, which is applied to the user
equipment, the method including: judging the type of the cable
inserted into the USB Type-C interface of the user equipment, when
detecting that an analog audio cable is inserted into the USB
Type-C interface, switch the D+ and D- pins of the USB Type-C
interface to connect with the left channel terminal and the right
channel terminal of the audio codec respectively, and when
detecting that a USB cable is inserted into the USB Type-C
interface, switch the D+ and D- pins of the USB Type-C interface to
connect with the data transmission terminal of the USB physical
layer respectively; wherein the USB Type-C interface is compatible
with USB signal delivery and analog audio peripherals; the USB
physical layer is connected with the USB Type-C interface to
realize the transmission of a USB signal; the audio codec is
connected with the USB Type-C interface to realize the transmission
of an analog audio.
[0013] In one embodiment, judging the type of the cable inserted
into the USB Type-C interface of the user equipment, includes:
judge the type of the cable inserted into the USB Type-C interface
by detecting a resistance value of a CC1 pin and/or CC2 pin of the
USB Type-C interface.
[0014] In one embodiment, judging the type of the cable inserted
into the USB Type-C interface of the user equipment, includes:
determine that an analog audio cable is inserted into the USB
Type-C interface, when detecting that the resistance value between
the CC1 pin and a GND pin of the USB Type-C interface and the
resistance value between the CC2 pin and the GND pin of the USB
Type-C interface are both less than 1 k.OMEGA..
[0015] In one embodiment, the method further includes: achieve the
microphone data transmission of the audio codec by utilizing a SBU1
pin or a SBU2 pin of the USB Type-C interface.
[0016] In one embodiment, the method further includes: judge
whether the analog audio cable inserted into the USB Type-C
interface supports a microphone by detecting the resistance value
of the SBU1 pin or the SBU2 pin of the USB Type-C interface.
[0017] According to embodiments of the disclosure, the USB Type-C
interface can be directly used to achieve an analog audio
transmission function, thus a traditional analog audio outlet, such
as a 3.5 mm audio outlet, can be omitted. Further, the printed
circuit board space of the user equipment may be further saved,
thus the user equipment may be manufactured to be more
portable.
BRIEF DESCRIPTION OF THE DRAWINGS
[0018] One or more embodiments are illustrated by way of example,
and not by limitation, in the figures of the accompanying drawings,
wherein elements having the same reference numeral designations
represent like elements throughout. The drawings are not to scale,
unless otherwise disclosed.
[0019] FIG. 1 shows a structure diagram of a headphone plug
provided by the prior art;
[0020] FIG. 2 shows a structure diagram of a headphone socket
provided by the prior art;
[0021] FIG. 3 shows an allocating schematic view of socket pins in
accordance with the USB Type-C specification;
[0022] FIG. 4 shows a principle schematic view of the user
equipment in accordance with one embodiment of the disclosure.
[0023] FIG. 5 shows a diagram of the method for data transmission
in accordance with one embodiment of the disclosure.
[0024] Part of the reference numerals and meanings thereof are as
follows: [0025] GND: Grounding [0026] MIC: Microphone [0027] USB
PHY: USB physical layer [0028] CODEC: Codec [0029] MICBIAS:
Microphone biasing [0030] L: Left channel [0031] R: Right channel
[0032] SW1: First analog switch device [0033] SW2: Second analog
switch device
DETAILED DESCRIPTION
[0034] The exemplary embodiments of the present disclosure will be
described in more detail hereinafter with reference to the
accompanying figures. Although the exemplary embodiments of the
present disclosure are shown in the accompanying figures, it should
be understood that the present disclosure can be embodied in
various forms, and should not be limited by embodiments set forth
herein. Conversely, these embodiments are provided so that the
disclosure will be better understood, and the scope of the present
disclosure will be fully conveyed to those skilled in the art.
[0035] USB Developer Forum (USB-IF) issued Universal Serial Bus
Type-C Cable and Connector Specification (version 1.0) on 11 Aug.
2014 and defined 24 pins and allocation thereof of a Type-C socket
interface. FIG. 3 shows an allocating schematic view of the socket
pins in accordance with the USB Type-C specification in the form of
a front view. Table 1 shows identifications, names and descriptions
of the 24 pins.
TABLE-US-00001 TABLE 1 Identifications Names Descriptions A1 GND
Grounding A2 TX1+ A pair of A3 TX1- differential signals A4
V.sub.BUS Power supplies A5 CC1 Configuration channel signals A6 D+
A pair of A7 D- differential signals A8 SBU1 Side band use A9
V.sub.BUS Power supplies A10 RX2- A pair of A11 RX2+ differential
signals A12 GND Grounding B1 GND Grounding B2 TX2+ A pair of B3
TX2- differential signals B4 V.sub.Bus Power supplies B5 CC2
Configuration channel signals B6 D+ A pair of B7 D- differential
signals B8 SBU2 Side band use B9 V.sub.BUS Power supplies B10 RX1-
A pair of B11 RX1+ differential signals B12 GND Grounding
[0036] According to the USB Type-C specification, CC1 and CC2 are
two key pins and have many functions, such as detecting connection,
front and back face distinguishing, VBUS pin configuration,
configuration of other modes (for example, audio accessory
connection and PCIE) and the like. Two groups of TX/RX differential
signal pairs are used for a data transmission of a USB3.1 standard,
and D+/D- differential signal pairs are used for being compatible
with a data transmission of a USB2.0 standard. SBU1 and SBU2 pins
are the reserved pins conforming to the Type-C specification and
used for extension function. The USB Type-C interface further
includes four grounding pins and four power supply pins.
[0037] FIG. 4 shows a principle schematic view of the user
equipment (for example, a smart phone) in accordance with one
embodiment of the disclosure. 1. The user equipment, including: a
USB Type-C interface 41, a USB physical layer (USB PHY) 42, an
audio codec (CODEC) 43, a first analog switch device SW1 and a
second analog switch device SW2. As shown in the figures, a left
channel terminal L and a right channel terminal R of the audio
codec (CODEC) and the data transmission terminal of the USB
physical layer (USB PHY) multiplex D+ and D- pins of the USB Type-C
interface. In addition, the reserved SBU1 and SBU2 pins conforming
to the USB Type-C specification are used for transmission of MIC
signals of the audio codec.
[0038] The first analog switch device SW1 is configured to, when
detecting that an analog audio cable is inserted into the USB
Type-C interface 41, switch the D+ and D- pins of the USB Type-C
interface to connect with the left channel terminal L and the right
channel terminal R of the audio codec 43 respectively. The first
analog switch device SW1 is further configured to, when detecting
that a USB cable is inserted into the USB Type-C interface, switch
the D+ and D- pins of the USB Type-C interface to connect with the
data transmission terminal of the USB physical layer 42
respectively.
[0039] The second analog switch device SW2 is configured to achieve
a microphone data transmission of the audio codec 43 by utilizing
the SBU1 pin or the SBU2 pin of the USB Type-C interface 41. As
shown in the FIG. 4, when the SBU1 is used for being connected with
an analog audio peripheral, for example, an MIC connecting line of
a headphone, the SW2 is configured to switch the SBU1 to connect
with the MIC terminal of the CODEC 43, and meanwhile the SBU2 can
serve as an audio equipment ground of the analog audio peripheral;
and vice versa.
[0040] As shown in the FIG. 4, the D+ pin is used for being
connected with the left channel terminal L of the CODEC 43, and the
D- pin is used for being connected with the right channel terminal
R of the CODEC. However, it should be understood that the wordings
"left" and "right" are opposite concepts, and in the concrete
implementation, the D- pin can also be used for being connected
with the left channel terminal L of the CODEC, and the D+ pin can
also be used for being connected with the right channel terminal R
of the CODEC.
[0041] According to the embodiment of the disclosure, the type of
the cable inserted into the USB Type-C interface can be judged by
judging the using states of other pins except the above-mentioned
pins (D+, D-, SBU1 and SBU2) in the USB Type-C interface 41.
[0042] In one embodiment, when the plugged cable is the analog
audio cable, many pins except the above-mentioned pins in the USB
Type-C interface 41 are all in a "suspended" high-resistance-value
state. As an example, the type of the cable inserted into the USB
Type-C interface, namely the USB Type-C cable or the analog audio
cable, can be judged by detecting the resistance values of the CC1
and/or CC2 pins of the USB Type-C interface.
[0043] In another embodiment, an analog audio cable interface used
for being matched with the USB Type-C interface 41 of the user
equipment can be configured so that the first analog switch device
SW1 and/or the second analog switch device SW2 can detect the type
of the plugged cable. For example, when the CC1 and CC2 pins and a
GND pin of the USB Type-C interface of the user equipment are used,
the GND pin is used for being connected with the GND of the analog
audio cable interface, and the analog audio cable interface is
configured to be provided with a resistor between the CC1 and CC2
of the USB Type-C interface of the user equipment and the GND
inside the interface, and the resistance value of the resistor and
resistance (generally 5.1 k.OMEGA.) of the CC1 and CC2 pins of the
standard USB Type-C interface (for example a USB plug).
Accordingly, the SW1 can judge the type of the cable inserted into
the USB Type-C interface (for example, a USB socket) by detecting
the resistance between the CC1 and CC2 pins and the GND. For
example, the SW can be configured to determine that the analog
audio cable is inserted into the USB Type-C interface, when
detecting the resistance value between the CC1 pin and the GND pin
of the USB Type-C interface and the resistance value between the
CC2 pin and the GND pin of the USB Type-C interface are both less
than 1 k.OMEGA..
[0044] According to the embodiment of the disclosure, the reserved
SBU1 and SBU2 pins conforming to the Type-C specification are used
for transmission of the MIC signals of the audio codec. However, it
should be understood that the second analog switch device SW2 shown
in the FIG. 4 is an optional component, for example, SW2
configuration is not necessary under the situation that the analog
audio cable inserted into the USB Type-C interface 41 does not
support a microphone (MIC) or the CODEC inside the user equipment
does not support the MIC.
[0045] In one embodiment, the MIC connecting line of the analog
audio cable interface matched with the SBU1 or the SBU2 of the USB
Type-C interface 41 of the user equipment can be configured so that
the second analog switch device SW2 can detect whether the plugged
analog audio cable supports the MIC or not. For example, whether
the MIC connecting line of the analog audio cable interface is
connected or not can be judged by detecting whether the SBU1 or the
SBU2 pin is in an unconnected "suspended" state or not. As an
example, if it is detected that the SBU1 pin is in a used state
while the SBU2 pin is still in the unused "suspended" state, the
SW2 can switch the SBU1 pin to be connected with the MIC terminal
of the CODEC so as to switch the SBU1 pin to be connected with a
grounding point. For example, the "suspended" state of the SBU1 or
the SBU2 pin can be obtained by detecting the resistance value
between the pin and the grounding point.
[0046] Alternatively, a resistance value between the MIC connecting
line of the analog audio cable interface configured to be matched
with the SBU1 or the SBU2 of the USB Type-C interface 41 of the
user equipment and the ground point may be configured to be in a
specified range, and then, a pin that supports MIC signal
transmission may be detected by detecting whether the resistance
value between the SBU1 or the SBU2 of the USB Type-C interface of
the user equipment and the ground point is in the specified
range.
[0047] According to an embodiment of the disclosure, the USB Type-C
interface of the user equipment may be directly utilized to achieve
the analog audio transmission function, so as to omit the
traditional analog audio outlet, for example, a 3.5 mm audio
outlet. If the user equipment is a cell phone, the cell phone may
be designed to have no headphone socket, which makes the cell phone
thinner. Also, the area occupied by the printed circuit board is
reduced to achieve more functions. For example, the clearance space
of a cell phone antenna may be increased to improve the cell phone
signals, or the battery space of the cell phone may be increased to
extend the standby time of the cell phone and the like.
[0048] It should be understood that the user equipment described in
the embodiments of the disclosure can be a smart phone, a portable
computer, a tablet computer, a desktop computer or other suitable
user equipments having a USB Type-C interface for supporting an
analog audio output.
[0049] FIG. 5 shows a diagram of the method for data transmission
in accordance with one embodiment of the disclosure, and the method
which is applied to the user equipment includes the following
steps: in step S501, judge the type of the cable inserted into the
USB Type-C interface of the user equipment, when detecting that an
analog audio cable is inserted into the USB Type-C interface,
perform the step S502, switch the D+ and D- pins of the USB Type-C
interface to connect with the left channel terminal and the right
channel terminal of the audio codec respectively; and when
detecting that a USB cable is inserted into the USB Type-C
interface, perform the step S503, switch the D+ and D- pins of the
USB Type-C interface to connect with the data transmission terminal
of the USB physical layer respectively.
[0050] wherein the USB Type-C interface is compatible with USB
signal delivery and analog audio peripherals; the USB physical
layer is connected with the USB Type-C interface to realize the
transmission of a USB signal; the audio codec is connected with the
USB Type-C interface to realize the transmission of an analog
audio.
[0051] Wherein judging the type of the cable inserted into the USB
Type-C interface of the user equipment, includes: judge the type of
the cable inserted into the USB Type-C interface by detecting a
resistance value of a CC1 pin and/or CC2 pin of the USB Type-C
interface.
[0052] wherein judging the type of the cable inserted into the USB
Type-C interface of the user equipment, includes: determine that an
analog audio cable is inserted into the USB Type-C interface, when
detecting that the resistance value between the CC1 pin and a GND
pin of the USB Type-C interface and the resistance value between
the CC2 pin and the GND pin of the USB Type-C interface are both
less than 1 M.OMEGA..
[0053] In one embodiment, the method further includes: achieve the
microphone data transmission of the audio codec by utilizing a SBU1
pin or a SBU2 pin of the USB Type-C interface.
[0054] In one embodiment, the method further includes: judge
whether the analog audio cable inserted into the USB Type-C
interface supports a microphone by detecting the resistance value
of the SBU1 pin or the SBU2 pin of the USB Type-C interface.
[0055] Wherein the user equipment described in the embodiments of
the disclosure can be a smart phone, a portable computer, a tablet
computer, a desktop computer or other suitable user equipments
having a USB Type-C interface for supporting an analog audio
output.
[0056] According to an embodiment of the disclosure, the USB Type-C
interface of the user equipment may be directly utilized to achieve
the analog audio transmission function, so as to omit the
traditional analog audio outlet. If the user equipment is a cell
phone, the cell phone may be designed to have no headphone socket,
which makes the cell phone thinner. Also, the area occupied by the
printed circuit board is reduced to achieve more functions.
[0057] It shall be noted that the above embodiments are disclosed
to explain technical solutions of the present disclosure, but not
for limiting purposes. While the present disclosure has been
described in detail with reference to the above embodiments, those
skilled in this art shall understand that the technical solutions
in the above embodiments can be modified, or a part of technical
features can be equivalently substituted, and such modifications or
substitutions will not make the essence of the technical solutions
depart from the spirit or scope of the technical solutions of
various embodiments in the present disclosure.
* * * * *